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US 5,358,737 AGranted
Method of brushing incompletely dried coating regions from a coated web
AssigneeAGFA-Gevaert N. V.
InventorsWillem Mues, Hendrik J. Geerts
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AssigneeAGFA-Gevaert N. V.
InventorsWillem Mues, Hendrik J. Geerts
Estimating the term…
A coating system for applying to a face of a moving continuous web a coating of predetermined thickness of a liquid coating composition, thereafter drying the thus-coated web under substantially constant drying condition, and collecting the dried coated web on a take-up roll, is provided with an arrangement for removing from the coating any portions exceeding the predetermined thickness which would not be completely dried during drying and would adhere to and contaminate surfaces coming in contact therewith, such as guide roller surfaces or the adjacent windings on the take-up roll. The arrangement includes web wiping means for contacting excessively thick regions of the coating which is adapted to be displaced from an inoperative position remote from the web to an operative position contacting the excessively thick regions of the coating, the displacement being actuated in response to the detection on the web of excessively thick coating regions. The web wiping means is driven in its operative position in a continuous, e.g. circular, path having a locus intersecting the web path and preferably is a cylindrical brush of flexible bristles. The removed coating portions may be cleaned from the wiping means e.g. by a scraper and aspirated away by suction.
In a method for coating a moving web in which a continuous web is advanced at a linear velocity from a supply roll through a coating station where a substantially uniform coating of a liquid coating composition having a thickness is applied to a face thereof, then through a drying station to dry the thus-applied coating on said advancing web, and finally to a take-up station for collection into a roll, in combination, the improvement of preventing contamination of surfaces coming in contact with an undried coated face of said web in the event of the presence on the coated web of nonuniformly coated regions due to temporary disturbance of the application of said coating, which comprises the steps of:
In a method for coating a moving web in which a continuous web is advanced at a linear velocity from a supply roll through a coating station where a substantially uniform coating of a liquid coating composition having a thickness is applied to a face thereof, then through a drying station to dry the thus-applied coating on said advancing web, and finally to a take-up station for collection into a roll, in combination, the improvement of preventing contamination of surfaces coming in contact with an undried coated face of said web in the event of the presence on the coated web of nonuniformly coated regions due to temporary disturbance of the application of said coating, which comprises the steps of:
Dependencies are inferred from the claim text.